diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index 524f1211cee..1da5a3f5023 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -69,13 +69,17 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c ) { GLuint i, reg = 0, mrf; -#if 0 - if (c->vp->program.Base.Parameters->NumParameters >= 6) - c->use_const_buffer = 1; + /* Determine whether to use a real constant buffer or use a block + * of GRF registers for constants. The later is faster but only + * works if everything fits in the GRF. + * XXX this heuristic/check may need some fine tuning... + */ + if (c->vp->program.Base.Parameters->NumParameters + + c->vp->program.Base.NumTemporaries + 20 > BRW_MAX_GRF) + c->use_const_buffer = GL_TRUE; else -#endif c->use_const_buffer = GL_FALSE; - /*printf("use_const_buffer = %d\n", c->use_const_buffer);*/ + printf("use_const_buffer = %d\n", c->use_const_buffer); /* r0 -- reserved as usual */ |